Shantideva

Shantideva (sometimes Santideva) was an 8th-century Indian Buddhist scholar at Nalanda University and an adherent of the Madhyamika philosophy.

His book the Bodhicaryavatara is currently in print in a variety of translations, sometimes glossed as A Guide to the Bodhisattva's Way Of Life or Entering the Path of Enlightenment. It is a long poem describing the process of enlightenment from the first thought to full buddhahood and is still studied by Mahayana and Vajrayana Buddhists today.